The Fiberfrax® blanket and mat product family is a group
of lightweight, thermally efficient ceramic fiber insulating
materials that combine the advantages of dimensional stability
at high temperatures with complete resistance to thermal
shock. Featuring a broad range of thermal capabilities and
physical characteristics, this product family provides proven
and effective solutions to a variety of heat processing

  • Specific Product Characteristics
  • Extremely low shrinkage: Fibermax Mat
  • Low shrinkage: Durablanket 2600 insulation
  • Exceptional handling strength: Durablanket 2600 insulation,Durablanket S insulation, Durablanket HP-S insulation,Fibermat Blanket
  • Exceptional hot strength: Durablanket 2600 insulation
  • Exceptional velocity resistance: Moist Pak-D insulation
  • Excellent conformance to complex shapes: Moist Pak-D
  • Low shot content (95% fiber index): Fibermax Mat
  • Exceptional sound absorption: Fibermat Blanket, PH blanket
  • High resiliency: Fibermax Mat
  • Excellent compression recovery: Fibermat Blanket
  • Excellent filtration capabilities: PH blanket
Fiberfrax blkt and mats

Fiberfrax® Blankt Family of products:

  • Durablanket® 2600
  • Durablanket S
  • Durablanket HP-S
  • Duraback®
  • Fibermat® Blanket
  • PH Blanket
  • Moist Pak-D®
  • Fibermax® Mat


Fiberfrax® ceramic fibers are a family of high-temperature
fibers designed to be used in a variety of industrial and
commercial applications. Manufactured from alumina-silica
materials, Fiberfrax fibers are chemically inert. Some of the
unique properties these fibers offer are:

•  High-temperature stability
•  Low thermal conductivity
•  Low heat storage
•  Excellent thermal shock resistance
•  Lightweight

Fiberfrax fibers are available in a variety of chemistries and
diameters which can service a wide variety of applications. In
addition, these fibers can be further modified by chopping or
by removal of the unfiberized particles (called shot). Lubricants
can also be added to the fiber to enhance fiber properties.
Fiberfrax fibers exhibit excellent chemical stability and
resistance to attack from most corrosive agents. Exceptions
include hydrofluoric acid, phosphoric acid and strong alkalis.
Fiberfrax fibers also effectively resist oxidation and reduction.
If wet by water or steam, thermal and physical properties
are restored upon drying. Fiberfrax fibers contain no water
of hydration.

Bulk Fiber

Fiberfrax® Bulk Family of products:

  • Fiberfrax 7000 Series Fiber
  • Fiberfrax 6000 Series


Fiberfrax® Lo-Con™ felt and Duraset® felt are unique product
forms in the Unifrax Corporation’s extensive ceramic fiber
product family. Felt products extend the performance of
Fiberfrax papers in a product form with lower densities and
increased mat thickness. Felt products are compressible but
resilient; they conform to irregular surfaces yet have sufficient
integrity to hold their shape in gaskets and formed parts.
Both felt grades are wet laid, uniform, ceramic fiber mats
which have been impregnated with a thermosetting resin.
In Lo-Con felt, this resin has been precured to produce a
semi-flexible rolled sheet available in different densities and
thicknesses. The binders in Duraset have been left uncured
so they can be molded under heat and pressure to retain a
complex shape after processing.
The organic binders remain functional at low and
moderate temperatures (to 650°F); however, the core
ceramic fiber materials will provide consistent performance
at temperatures well in excess of 2000°F, providing excellent
thermal insulation in a wide range of applications.

Fiberfrax Felt products

Fiberfrax® Felt Family of products:

  • Lo-Con™
  • Binder Free Lo-Con™
  • Duraset®


The Fiberfrax® ceramic fiber paper product line is a unique
family of products which is manufactured by forming aluminosilicate
fibers in a nonwoven matrix. The ceramic fibers are randomly
orientated during manufacture, then held in place with a
latex binder system. A specialized paper-making process is
statistically controlled to form uniform, lightweight, flexible sheets.
Unifrax has been producing Fiberfrax papers for over 25
years and is the largest ceramic fiber producer worldwide with
in-house paper-making capabilities.
By blending different fibers, binders, and additives while
varying the manufacturing process, Unifrax now produces a variety
of Fiberfrax paper products for a wide range of applications.
Fiberfrax papers exhibit excellent chemical stability, resisting
attack from most corrosive agents. Exceptions are hydrofluoric,
phosphoric acids and concentrated alkalies. If Fiberfrax papers
are wet by water or steam, all thermal and physical properties
are completely restored upon drying. No water of hydration is
present in most Fiberfrax paper grades. Fiberfrax papers have
good dielectric strengths.
Fiberfrax papers, with the exception of the inorganic series,
will generate small amounts of smoke and trace element outgassing
during the initial exposure to temperatures above 450°F.

Fiberfrax Ceramic Fiber Paper

Fiberfrax® Paper Family of products:

  • 440
  • Roll Board
  • 550
  • 970
  • 880
  • hsa
  • 972-H
  • 882-H
  • HSA (of)


The Fiberfrax® Specialties family of products includes Fiberfrax
moldables, pumpables, caulks, coating cements, rigidizers,
tamping mix, and Moist-PackTM blanket. Many of these products
contain a wet, inorganic binder to provide both strength and
hardness at elevated temperatures. The range of product forms
provides a choice of materials to address a wide range of application
problems, such as resistance to hot gas erosion, flame
impingement, the ability to be formed into special shapes and
configurations, installation into blind hot spots and hard-toinsulate
Fiberfrax Specialties also possess the advantages inherent
with other Fiberfrax ceramic fiber insulating materials: high temperature
resistance, excellent insulating properties, thermal
shock resistance, chemical stability, and ease of installation.

Fiberfrax Specialties

Fiberfrax® Specialties Family of products:

  • Moldables
  • Pumpables
  • Caulkings
  • Cements
  • Coatings
  • Rigidizers


Fiberfrax® Silplate® Mass 1500 is manufactured from the combination of high temperature fibrous materials and sintered high-purity, refractory oxides. Silplate Mass 1500 is a compound ready for application at temperatures up to 1500°C (2732°F). It may be applied on ceramic fiber insulation to form a surface that is highly resistant to abrasion and flame impingement.

Silplate Mass 1500 is applied on ceramic fiber lining systems with the following benefits:

  • Increased abrasion resistance and durability
  • Underlying fiber protected from shrinkage and/or chemical attack
  • Minimized heat loss through cracks in the insulation
  • Increased flue gas velocity resistance
  • Heat Reflectance/Energy Efficiency

Silplate Mass 1500 is applied on hard refractory surfaces with the following benefits:

  • Increased lining service life
  • Reduced heat loss
  • Increased operating temperature
  • Heat Reflectance/Energy Efficiency
  • Thermal shock protection
Silplate Mass 1500 Product info


Insulfrax® S Blanket from Unifrax was developed from a calcium,
magnesium, silicate chemistry to provide thermal insulation at
continuous operating temperatures up to 2012°F (1100°C).
Insulfrax S Blanket also meets European regulatory requirement
(Directive 97/69/EC). Insulfrax S fiber chemistry has been combined
with Unifrax’s proprietary fiber spinning technology to create
a specialty high-temperature blanket with superior thermal
and mechanical properties.
Insulfrax S blanket is used in a wide range of applications
including refractory linings, thermal insulation, appliances, and
molten metals transfer.

Insulfrax® General Characteristics:

Insulfrax S Blanket is a flexible, strong, lightweight, needled
blanket produced from Insulfrax Fiber. Mechanical needling of
the spun Insulfrax fibers eliminates the need for binders in the
product’s manufacture and results in a product with high tensile
strength. Since Insulfrax S Blanket is completely inorganic, the
product exhibits no smoke generation or outgassing in service.
Insulfrax S Blanket combines low thermal conductivity with
excellent resistance to thermal shock. Note that high humidity
and wetting with water prior to service has little effect on
Insulfrax S Blanket.
A series of green dots on the surface of the blanket make
identification, tracking, and inspection of Insulfrax S Blanket
simple on the job site or in the fabrication shop.
The Insulfrax Fiber calcium, magnesium, silicate chemistry
provides supe rior wetting resistance to molten aluminum alloys.
Testing with corrosive aluminum alloys at elevated temperatures
has proven that Insulfrax fibers are superior to traditional
alumina/silica refractory ceramic fibers.

Insulfrax S blanket

Insulfrax® S Blanket Applications:

  • Appliances
  • Hearth Products
  • Primary Metals
  • Metals Processing
  • Petrochemical/Power
  • Ceramic and Glass


Insulfrax® Paper is an evolutionary product which is
manufactured by forming Insulfrax Fiber in a nonwoven
matrix. These fibers are randomly oriented during
manufacturing and then held in place with a latex binder
system. A specialized paper-making process is utilized
to form uniform lightweight, flexible materials, including
Insulfrax Paper.
Insulfrax Fiber, utilized in Insulfrax Paper, is based upon
a calcium, magnesium, silicate (CMS) chemistry. This CMS
fiber chemistry has been successfully used to solve a
variety of application problems from 800°F (427°C) up to
2012°F (1100°C). In addition to high temperature resistance,
Insulfrax Fiber meets European regulatory requirements
(Directive 97/69/EC).
The calcium, magnesium, silicate chemistry of Insulfrax
Fiber provides superior wetting resistance to molten
aluminum alloys. Testing with corrosive aluminum alloys at
elevated temperatures has proven that Insulfrax is superior
to traditional alumina/silica refractory ceramic fibers.
Insulfrax Paper will generate small amounts of smoke
and trace element outgassing during initial exposure to
temperatures above 450°F (232°C).

Fiberfrax Ceramic Fiber Paper

Insulfrax® Paper Applications:

  • Automotive and aerospace heat shields
  • Gaskets for ovens, stoves, heaters, and other appliances
  • Nonferrous ingot mold liners
  • Refractory backup insulation in ladles, glass tanks, and
    other high-temperature furnaces
  • Refractory backup insulation in ladles, glass tanks, and
    other high-temperature furnaces
  • Molten aluminum transfer systems

FyreWrap® Marine Blanket

FyreWrap Marine Blanket from Unifrax is a totally inorganic,
flexible, high-temperature insulation blanket specifically
designed to provide passive fire protection for marine
applications. The calcia, magnesia, silica chemistry is
designed to enhance biosolubility. Unifrax’s proprietary fiber
spinning technology combined with mechanical needling of
the fibers eliminates the need for binders in the product. This
results in a material with high tensile strength and superior
thermal and acoustical properties. Insulfrax Marine Blanket
is chemically stable and its thermal properties are unaffected
after exposure to water immersion or high humidity.

FyreWrap Marine Blanket provides fire protection
insulation for a variety of rated assemblies on marine
structures and vessels. Thin, lightweight systems combined
with a flexible product form result in lower installation costs
and significant weight savings. This offers builders and
owners reduced structure weight, which may yield increased
vessel speed, fuel savings and available payloads. FyreWrap

Marine Blanket provides the following product features:

  • U.S. Coast Guard approved for steel and aluminum
  • Complies with SOLAS Safety Objectives and new
    IMO FTP Code fire test requirements; Res.A.754(18)
  • Fire Resisting Division for High Speed Craft (HSC);
    Res. MSC.45(65)
  • ABS (American Bureau of Shipping) approved for steel
    and aluminum structures
  • Fire protection structural insulation for bulkheads
    and decks
  • Significant weight savings versus mineral wool systems
  • Flexible blanket is easy to cut and install
Insulfrax S blanket

FyreWrap® Marine Blanket Applications:

FyreWrap Marine Blanket is utilized to insulate bulkheads
and decks on passenger and vehicle fast ferries, cruise
ships, commercial and military vessels, and offshore oil
platforms. Tested systems are in compliance with U.S. Coast
Guard regulations, now defined under IMO Res.A.754(18).

  • Typical applications include:
  • Steel bulkheads and decks
  • Aluminum bulkheads and decks, including extruded thin
    plate designs (min. 2mm thick)
  • Vehicle loading areas, engine rooms, storage areas, etc.
  • Various H-Rated offshore structures (contact Unifrax for
    details on tested systems and current certifications)
  • Non-combustible insulation